XL4015 DC-DC Step Down Adjustable Power Supply Module

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Component Documentation

Overview

The XL4015 DC-DC Step Down Adjustable Power Supply Module is a high-performance, compact, and efficient power supply module designed to provide a stable and adjustable output voltage from a wide range of input voltages. This module is based on the XL4015 IC, a high-frequency, high-efficiency DC-DC converter that enables the step-down conversion of power supplies.

Functionality

The XL4015 DC-DC Step Down Adjustable Power Supply Module is designed to convert input voltages in the range of 4-38V DC to a stable output voltage that can be adjusted between 1.25-35V DC. This module is ideal for a wide range of applications, including robotics, drones, RC models, and other electronic projects that require a stable and efficient power supply.

Key Features

High Efficiency: The XL4015 DC-DC Step Down Adjustable Power Supply Module boasts a high efficiency of up to 96%, making it an ideal choice for battery-powered devices or applications where power consumption is a concern.
Adjustable Output Voltage: The output voltage of the module can be adjusted between 1.25-35V DC using a potentiometer, allowing users to set the desired output voltage for their specific application.
Wide Input Voltage Range: The module can operate with input voltages ranging from 4-38V DC, making it suitable for a variety of power sources, including batteries, solar panels, and wall adapters.
Short-Circuit Protection: The module features built-in short-circuit protection, which prevents damage to the module and connected devices in the event of a short circuit.
Over-Temperature Protection: The module is equipped with over-temperature protection, which helps prevent overheating and ensures reliable operation.
Low Dropout Voltage: The XL4015 DC-DC Step Down Adjustable Power Supply Module has a low dropout voltage, ensuring that the output voltage remains stable even when the input voltage is close to the output voltage.
Compact Design: The module is designed to be compact and lightweight, making it ideal for space-constrained applications.
High Current Capability: The module can deliver a maximum output current of up to 3A, making it suitable for high-power applications.

Technical Specifications

Input Voltage

4-38V DC

Output Voltage

1.25-35V DC (adjustable)

Output Current

Up to 3A

Efficiency

Up to 96%

Switching Frequency

150kHz

Operating Temperature

-40C to +85C

Dimension

43mm x 21mm x 14mm

Applications

The XL4015 DC-DC Step Down Adjustable Power Supply Module is suitable for a wide range of applications, including

Robotics and drones

RC models and toys

Electronic projects and prototypes

Industrial control systems

Battery-powered devices

Solar-powered systems

Automotive systems

Conclusion

The XL4015 DC-DC Step Down Adjustable Power Supply Module is a high-performance, efficient, and compact power supply solution that offers a wide range of features and benefits. Its adjustable output voltage, high efficiency, and compact design make it an ideal choice for a variety of applications requiring a stable and efficient power supply.

Pin Configuration

XL4015 DC-DC Step Down Adjustable Power Supply Module Pinout and Connection Guide
The XL4015 DC-DC Step Down Adjustable Power Supply Module is a popular and efficient voltage regulator module used in various IoT and electronic projects. This documentation provides a detailed explanation of each pin on the module, along with a step-by-step connection guide.
Pinout:
1. Vin (Input Voltage):
Function: Supplies the input voltage to the module.
Voltage Range: 4V to 38V (recommended), up to 40V (maximum).
Notes: Connect the positive terminal of the power source to this pin.
2. Vout (Output Voltage):
Function: Provides the regulated output voltage.
Voltage Range: Adjustable from 1.25V to 35V (depending on the input voltage and module configuration).
Notes: Connect the load (device or circuit) to this pin, ensuring the output voltage is within the load's rated specifications.
3. GND (Ground):
Function: Provides a common ground reference for the module.
Notes: Connect the negative terminal of the power source and the load to this pin.
4. ADJ (Adjustment Pin):
Function: Allows adjusting the output voltage through an external resistor divider network.
Notes: Typically used in conjunction with R1 and R2 resistors to set the desired output voltage (see below).
5. Enable (EN):
Function: Enables or disables the module's operation.
Logic: Active-low, meaning the module is enabled when the pin is connected to GND (low) and disabled when connected to Vin (high).
Notes: Typically connected to GND to enable the module. Can be connected to a digital output from a microcontroller to dynamically control the module's operation.
Connection Structure:
To use the XL4015 module, follow these steps:
Step 1: Power Supply Connection
Connect the positive terminal of the power source (e.g., battery or wall adapter) to the Vin pin.
Connect the negative terminal of the power source to the GND pin.
Step 2: Output Voltage Configuration (Optional)
If you want to adjust the output voltage, connect a resistor divider network between Vin and GND, with the ADJ pin as the center tap.
Calculate the required resistor values (R1 and R2) using the following formula:
Vout = 1.25V (1 + R2 / R1)
Choose suitable resistor values to achieve the desired output voltage.
Step 3: Load Connection
Connect the load (device or circuit) to the Vout pin, ensuring the output voltage is within the load's rated specifications.
Connect the negative terminal of the load to the GND pin.
Step 4: Enable Pin Configuration (Optional)
If you want to dynamically control the module's operation, connect the EN pin to a digital output from a microcontroller.
Otherwise, connect the EN pin to GND to enable the module.
Important Notes:
Ensure the input voltage is within the recommended range (4V to 38V) to maintain the module's efficiency and prevent damage.
Use a suitable heat sink if the module will be operating at high currents or temperatures.
Follow proper safety precautions when working with electrical circuits to avoid injury or damage.
By following this pinout and connection guide, you can effectively use the XL4015 DC-DC Step Down Adjustable Power Supply Module in your IoT and electronic projects.

Code Examples

XL4015 DC-DC Step Down Adjustable Power Supply Module Documentation

Overview

The XL4015 DC-DC Step Down Adjustable Power Supply Module is a high-efficiency, high-power density DC-DC step-down converter module. It is designed to provide a stable output voltage from a wide input voltage range, making it suitable for a variety of applications, including robotics, automation, and IoT projects.

Technical Specifications

Input Voltage: 4-38V
 Output Voltage: 1.25-35V (adjustable)
 Output Current: up to 5A
 Efficiency: up to 96%
 Switching Frequency: 150kHz
 Dimension: 35mm x 35mm x 14mm

Pinout

VIN: Input Voltage (4-38V)
 VOUT: Output Voltage (1.25-35V, adjustable)
 GND: Ground
 EN: Enable Pin (active high)
 ADJ: Output Voltage Adjustment Pin

Example 1: Basic Usage with Arduino

In this example, we will use the XL4015 module to power an Arduino board from a 12V input voltage.

```c++
const int enPin = 2;  // Enable pin connected to Arduino digital pin 2
const int adjPin = A0;  // Adjustment pin connected to Arduino analog pin A0

void setup() {
  pinMode(enPin, OUTPUT);
  pinMode(adjPin, OUTPUT);
  
  // Enable the module
  digitalWrite(enPin, HIGH);
  
  // Set the output voltage to 5V (Arduino's operating voltage)
  analogWrite(adjPin, 128);  // Adjust the output voltage by writing a value between 0-255 to the ADJ pin
}

void loop() {
  // Power the Arduino board using the XL4015 module
}
```

Example 2: Adjustable Output Voltage with Raspberry Pi

In this example, we will use the XL4015 module to power a Raspberry Pi from a 24V input voltage and adjust the output voltage using a Python script.

```python
import RPi.GPIO as GPIO
import time

# Set up the GPIO library
GPIO.setmode(GPIO.BCM)

# Define the enable and adjustment pins
enPin = 17
adjPin = 18

# Set up the pins as outputs
GPIO.setup(enPin, GPIO.OUT)
GPIO.setup(adjPin, GPIO.OUT)

# Enable the module
GPIO.output(enPin, GPIO.HIGH)

try:
    while True:
        # Set the output voltage to 5V (Raspberry Pi's operating voltage)
        GPIO.output(adjPin, GPIO.HIGH)
        time.sleep(1)
        
        # Set the output voltage to 3.3V (optional)
        GPIO.output(adjPin, GPIO.LOW)
        time.sleep(1)
except KeyboardInterrupt:
    GPIO.cleanup()
```

Example 3: Automatic Voltage Adjustment using a Potentiometer

In this example, we will use a potentiometer to adjust the output voltage of the XL4015 module.

```c++
const int enPin = 2;  // Enable pin connected to Arduino digital pin 2
const int adjPin = A0;  // Adjustment pin connected to Arduino analog pin A0
const int potPin = A1;  // Potentiometer pin connected to Arduino analog pin A1

void setup() {
  pinMode(enPin, OUTPUT);
  pinMode(adjPin, OUTPUT);
  pinMode(potPin, INPUT);
  
  // Enable the module
  digitalWrite(enPin, HIGH);
}

void loop() {
  int potValue = analogRead(potPin);
  int adjValue = map(potValue, 0, 1023, 0, 255);
  analogWrite(adjPin, adjValue);
  
  // The output voltage will be adjusted based on the potentiometer's value
  delay(10);
}
```

Notes and Precautions

Ensure proper heat sinking and thermal management to prevent overheating.
 Use a suitable input capacitor to filter out any ripple voltage.
 Adjust the output voltage carefully to avoid damage to the connected devices.
 Use a stable input voltage to ensure reliable operation.

By following these examples and guidelines, you can effectively use the XL4015 DC-DC Step Down Adjustable Power Supply Module in your IoT projects.